The Tragedy of Otranto took place on 28 March 1997 when the Albanian ship Kateri i Radës sank in a collision with the Italian naval vessel Sibilia in the Strait of Otranto and at least 57 Albanians, aged 3 months to 69 years, lost their lives. The emigrants had been part of a large migration of Albanians to Italy following a popular uprising that began after the collapse of several large-scale pyramid schemes. In order to prevent the unauthorized entry of illegals migrants into Italy, the Italian Navy set up a procedure to board Albanian vessels whenever encountered, implementing a de facto blockade.